mirror of
https://github.com/avatao-content/baseimage-tutorial-framework
synced 2024-11-09 01:57:17 +00:00
54 lines
1.5 KiB
Python
54 lines
1.5 KiB
Python
from abc import abstractmethod
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from json import loads, dumps, JSONDecodeError
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from tfw import EventHandlerBase
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from tfw.config.logs import logging
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from .pipe_io_server import PipeIOServer
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LOG = logging.getLogger(__name__)
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class PipeIOEventHandlerBase(EventHandlerBase):
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def __init__(self, key, in_pipe_path, out_pipe_path, permissions=0o600):
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super().__init__(key)
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self.pipe_io = CallbackPipeIOServer(
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in_pipe_path,
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out_pipe_path,
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self.handle_pipe_event,
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permissions
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)
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self.pipe_io.start()
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@abstractmethod
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def handle_pipe_event(self, message):
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raise NotImplementedError()
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def cleanup(self):
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self.pipe_io.stop()
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class CallbackPipeIOServer(PipeIOServer):
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def __init__(self, in_pipe_path, out_pipe_path, callback, permissions):
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super().__init__(in_pipe_path, out_pipe_path, permissions)
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self.callback = callback
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def handle_message(self, message):
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self.callback(message)
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class PipeIOEventHandler(PipeIOEventHandlerBase):
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def handle_event(self, message):
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try:
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json_bytes = dumps(message).encode()
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self.pipe_io.send_message(json_bytes)
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except TypeError:
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LOG.error("Message %s not JSON serializable! Ignoring...", message)
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def handle_pipe_event(self, message):
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try:
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json = loads(message)
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self.server_connector.send(json)
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except JSONDecodeError:
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LOG.error("Invalid JSON received on %s! Ignoring...", self.pipe_io.in_pipe)
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